Shooting Baby Sea Lions

So we head to La Paz in less than 3 weeks. I have never been. We are going to dive with the baby sea lions. Not sure how many dives.
I have a new D90 set-up in and Nauticam housing with dual SB-105 strobes. For wide angle I will be using the 12-24mm.
I have not shot in shallow water in a fast environment like this probably since sting ray city in 2006. But what I am looking for is any tips on settings on camera or strobes on or off, or maybe 1/4 power for fill light. I normally shoot in manual, but I think in Cayman I shoot in shutter priorty for the sting rays.

Any insight would be great! I just don't want to come back with backscatter or missed shots!!

The pups will be getting quite old by now - so not as frantic as they were a few months ago.

The best thing is not to track the pups around trying to take every shot imaginable, but to work one angle at a time. Get an idea for a shot, set up the camera and strobes for that shot and then work it for 5-10 minutes. Then change to another shot.